What is the XML entity number for this character?

I'm able to encode the 'masculine ordinal operator' like this for my XML file.


 <?xml version="1.0" encoding="AL32UTF8"?> 
 <Calle>       
   <Linea>
       <Lugar>Lugar n&#186;3</Lugar>    
 </Linea> 
 </Calle>

However the glyph I'd like to encode is the multibyte character as described in

select chr(49850) as multibyte_char from dual

The character look like this, and I call it an underlined masculine ordinal operator

chr49850

Questions

What is the Entity Number for this Oracle chr(49850) or how encode this in XML? Better yet, where are some reference for this?